Clutch.



No. 627,613. Patented lune 27, 1899.

F. R. GOLMAN.

CLUTCH.

(Application led Apr. 17, 1899.) (No Model.)

u ab' a/l al Z TI I f y L' Wnesses: [nre/M071:

UNITED STATES PATENT OFFICE.

FRED R. GOOLMAN,

FOURTI-IS TO ALFRE N. GOOLMAN, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 627,613,

Application filed April 17, 1899. Serial No. 713,275. (No model.) f

OF ST. JOHNSVILLE, NEW YORK, ASSIGNOR OF THREE- D P. ROTH, FREDERICK ENGELHARDT, AND JOHN dated .Tune 27, 1899.

To all whom it may concern,.-

Be it known that I, FRED R. GOOLMAN, a

citizen of the United States, and a resident 'of St. Johnsville, Montgomery county,

New

rlhis invention relates to electric motors of f the class which are started under aload.

induction-motors cannot load except with outside By my invention the load is (o is well known that start when under a assistance.

taken up at any desired rate of speed, thus obviating the x5 enced.

In the accompanying difficulties heretofore experidrawings, Figure lis a sectional elevation of part of a motor embodyng my invention; Fig.

line 2 2, Fig. l.

2, a section on The armature ct of the motor has a hub a' revolubly mounted upon shaft b between a pair of collars b'.

To one end of the armature is attached an annular disk c, to the face .of which is pivoted at d an elbow-shaped dog 5 d, having a weighted tailpiece d2.

this tailpiece and tends to the dog outward. In the dog (l there is keyed to spring e engages swing the jaw of same plano with A weak shaft a ratchet-wheel f, having one or more teeth. e will crowd thctailpiecc (l2 When thc motor is at rest, the spring against a stop g and hold the jaw oif the ratchet-wheel f. When thel current is turned on, the armature, being entirely free on its shaft, starts freely, and after the armature has attained the de- 35 sired rate of speed the centrifugal force, overcoming the tension of the spring e,will throw the dog into engagement with ratchet-wheel Thus the shaft l1 will be rotated, together and will carry the load 4o until the current is turned od. By regulating the strength of the spring e any desired rate of speed may be attained before the load is taken up,

What I claim is- In an electric motor, the combination of a shaft with an armature having a hub revoluble upon the shaft, a disk secured to the armature, a dog having a weighted tailpiece and pivoted to the disk, and a ratchet-wheel 5o mounted upon the shaft, the jaw of the dog being adapted to lengage the ratchet-wheel l when the weighted tailpiece of the dog is swung outward by centrifugal force, substantially as specified.

Signed by me, at St. Johnsville, New York, this Gth day of April, 1899.

FRED R. GOOLMAN.

with the armature,

Witnesses: v

EDWARD R. HALL, W. II. STAHL. 

